Changing LAN IP address (not domain name or public), will this cause issues?

I need to migrate the Kayako Fusion installation we are using do a different subnet as the one its on is being retired for various reason.
Ive seen some thing suggesting licensing issues or other problems so I wanted to post a quick question wondering if simply changing the host IP address will break anything?
The domain name or public mappings wont change, only the LAN segment.
Any thoughts appreciated.